Question

resolva essas equações

a)2x-1=x+10
b)3x+x=x+10
c)5x-8=x+4
d)3x+10=2x
e)3x-20=x+10
f)8-5x=x
g)2x+5=27
h)4x-8=2x+6
i)7x+1=6x+6
j)5x-3=2x-9

se quiser nao responde todas so quero que tire minha dúvida ​

Answer 1

Resposta:

a) 2x - 1 = x + 10

2x - x = 10 + 1

x = 11

b) 3x + x = x + 10

4x - x = 10

3x = 10

$x = \frac{10}{3}$

c) 5x - 8 = x + 4

5x - x = 4 + 8

4x = 12

x = 12/4

x = 3

d) 3x + 10 = 2x

3x - 2x = - 10

x = - 10

e) 3x - 20 = x + 10

3x - x = 10 + 20

2x = 30

x = 30/2

x = 15

f) 8 - 5x = x

- 5x - x = - 8

- 6x = - 8

g) 2x + 5 = 27

2x = 27 - 5

2x = 22

x = 22/2

x = 11

h) 4x - 8 = 2x + 6

4x - 2x = 6 + 8

2x = 14

x = 14/2

x = 7

i) 7x + 1 = 6x + 6

7x - 6x = 6 - 1

x = 5

j) 5x - 3 = 2x - 9

5x - 2x = - 9 + 3

3x = - 6

x = -6/3

x = - 2